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Tyrosine kinase inhibitor interruptions, discontinuations and switching in patients with chronic-phase chronic myeloid leukemia in routine clinical practice: SIMPLICITY
Heidelberg Univ, Weinheim, Germany;ELN Fdn, Weinheim, Germany.
Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA.ORCID iD: 0000-0002-8636-1071
Bristol Myers Squibb Co, Princeton, NJ USA.
Univ Milano Bicocca, San Gerardo Hosp, Monza, Italy.
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2019 (English)In: American Journal of Hematology, ISSN 0361-8609, E-ISSN 1096-8652, Vol. 94, no 1, p. 46-54Article in journal (Refereed) Published
Abstract [en]

SIMPLICITY (NCT01244750) is an observational study exploring tyrosine kinase inhibitor (TKI) use and management patterns in patients with chronic phase-chronic myeloid leukemia in the US and Europe in routine clinical practice. Herein we describe interruptions, discontinuations and switching of TKI therapy during the initial 2 years of treatment among 1121 patients prospectively enrolled between October 1, 2010 and March 7, 2017. Patient characteristics were broadly similar between the imatinib (n = 370), dasatinib (n = 376), and nilotinib (n = 375) cohorts. Treatment interruptions occurred in 16.4% (year 1) and 4.0% (year 2) of patients, mainly attributed to hematologic intolerances. Treatment discontinuations occurred in 21.8% (year 1) and 10.2% (year 2) of patients, with the highest rate within the first 3 months for intolerance. Switching of TKI was seen in 17.8% (year 1) and 9.5% (year 2) of patients. Significant associations were found between TKI switching and female gender (year 1), age >= 65 years at diagnosis (year 2) and treatment with imatinib (year 2). Intolerance was the most common reason given for patients discontinuing and for switching TKI therapy; however resistance was also cited. Lack of response monitoring in routine clinical practice may have resulted in lower identification of resistance in this dataset. Data from SIMPLICITY suggest that, in routine clinical practice, intolerance and resistance to TKIs influence decisions to change treatment. Changes in TKI therapy are frequent, with nearly a third of patients discontinuing their first-line TKI.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 94, no 1, p. 46-54
National Category
Hematology Cancer and Oncology
Identifiers
URN: urn:nbn:se:uu:diva-373314DOI: 10.1002/ajh.25306ISI: 000453909800022PubMedID: 30290003OAI: oai:DiVA.org:uu-373314DiVA, id: diva2:1279371
Available from: 2019-01-16 Created: 2019-01-16 Last updated: 2019-01-16Bibliographically approved

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Simonsson, Bengt

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